Mac OS X 10.10
Jenkins ver. 1.565.3.1 (Jenkins Enterprise by CloudBees 14.05)
JDK - java version "1.8.0_11"
Java(TM) SE Runtime Environment (build 1.8.0_11-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.11-b03, mixed mode)
I've seen these error messages in my console output, which comes from jmdns.
The level of the logging messages should be toned down significantly given that these are from a relatively minor feature in Jenkins.